1 Samuel 8:10-12

10So Samuel told all the words of the Lord to the people who were asking him for a king.

11He said, “These will be the ways of the king who will reign over you: he will take your sons and appoint them for himself to his chariots and among his horsemen and they will run before his chariots.

12He will appoint them for himself to be commanders over thousands and over fifties, and some to do his plowing and to reap his harvest and to make his implements of war and equipment for his chariots.